Friction tool-holder.



B. 1:". VIGKERY.

FRICTION TOOL HOLDER.

APPLICATION FILED JULY 8, 1909.

993,421 Patented May 30, 1911.

m w if A! THE NORRIS FETERS co. WASHINGTON. D. c.

BENJAMIN 1i. VICKERY,

0F GIRARD, ALABAMA.

FRICTION TOOL-HOLDER.

Specification of Letters Patent.

Patented May 30, 1911.

Application filed July 8, 1909. Serial No. 506,511.

T 0 all whom it may concern:

Be it known that I, BENJAMIN F. VIoKnRY, a citizen of the United States,residing at Girard, in the county of Russell and State of Alabama, haveinvented new and useful Improvements in Friction Tool-Holders, of whichthe following is a specification, it being understood that variouschanges in the form, proportions, size, and minor details of thestructure may be made without departing from the spirit or sacrificingany of the advantages of the invention.

My invention relates to improvements in friction tool holders; theobjects of which are, first, to provide a tool holder in which the toolor cutter cannot slip or chatter; sec- 0nd, to enable the operator toinstantly and accurately adjust the said tool or cutter; third, toeliminate set screws, attendant lost time and expense caused by theiruse; fourth, to prevent the breaking of tools or cutters caused by setscrews.

I attain these objects by the mechanism shown in the accompanyingdrawing, in which Figure 1, is a horizontal side elevation partly brokenaway, showing the interior mechanism of this tool; Fig. 2, is anenlarged plan view of the tool carrier shown at 2 in Fig. 1; Fig. 3, isa plan view of the front portion of the holder, showing the interior bydotted lines; Fig. 4, is a plan view of the front end of the toolholder, as it is made for soft metals and light work.

Similar numerals refer to similar parts throughout the several views.

1 is the tool holder proper, which is made of any suitable material; oneend is designed to engage the usual fastenings of lathes, planers,shapers or other machines on which it is to be used; while the oppositeend is shaped and bored to receive the tool carrier 2. The said toolcarrier 2, is composed of a metal plug, constructed in such a manner asto fit inside of the front end of the tool holder 1, and is held inproper position by a guide pin 3, in the outer wall of the said toolholder 1, and which engages a longitudinal groove in .the said toolcarrier one side of the rectangular slot 4, forming an inclined plane 5.Inside of the said rectangular slot 4, resting on the said inclinedplane 5, and prevented from dropping out of position by retainers 6, isa friction roller 7 adapted to engage the tool or cutter 8, when it ismoved in a backward direction.

In Fig. 4, is shown a very desirable method of constructing this toolholder for soft metals and general light work; it has no tool carrier 2,but has the rectangular slot 4, which is made in the forward end of theholder 1; otherwise it is the same as shown in the other figures; thisplan is not practical in the larger tools, owing to the fact that therectangular slot 4, is so large it would weaken the said holder 1 tosuch an extent it would break.

To operate this device it is secured to machines in the usual way, andwhen the cutter 8, is to be removed for any reason, it is withdrawn inthe direction of the arrow shown in Fig. 3. It is replaced in the samedirection and is moved forward a suitable distance and pressure appliedin a direction opposite to the arrow, thereby causing the frictionroller 7, to move along the inclined plane until the cutter 8, is heldfirmly. In case the cutter should be a little too small the key 9, isdriven down until it causes the friction roller 7, to tighten on thesaid cutter 8.

Having thus described my invention what I claim and desire to secure byLetters Patent is- 1. In a friction tool holder, the combination of alongitudinal metal bar, one end of which constitutes the shank or bodyof the tool, while the opposite end is designed to carry a cuttingmember carrier or clamping member, which combines a metal plug having arectangular slot near one end, disposed at any desired angle, one sideof the said rectangular slot forming an inclined plane, a movablefriction member, and means for retaining the said movable frictionmember in position, substantially as shown and described.

2. A friction tool holder, comprising a longitudinal metal bar, one endof which constitutes the shank or body of the tool,

the opposite end having a rectangular slot disposed at any desiredangle, one side of the said rectangular slot forming an inas my own Ihave hereto signed my name inclined plane, a movable friction member inthe presence of two Witnesses.

said rectangular slot, adapted to enga 'e a cutting member, and meansfor retair ling BENJAMIN VIOKERY' 5 the said movable friction member inposi- Witnesses:

tion substantially as shown and described. C. T. GIFFoRD, In testimonythat I claim the foregoing G. M. H001).

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

